Unfinished WIP of the Vinci Clockwork Spider from Rise of Nations: Rise of Legends.
Includes the concept art harpoon mounted to the steam cannon.
References: https://vignette.wikia.nocookie.net/riseoflegends/images/e/e7/RoL_Vinci_Clockwork_Spider.jpg/revision/latest?cb=20191225181407
https://vignette.wikia.nocookie.net/riseoflegends/images/9/94/Clockwork_Spider.jpg/revision/latest?cb=20110823072016